language pairs
default set of models:
"es,de,it,en,fr,cs,da,nl,hu,pl,pt,sk,ru,tr,uk,fi,eo"
all ARGOS models of https://www.argosopentech.com/argospm/index/
we may add some OPUS models https://community.libretranslate.com/t/opus-mt-language-models-port-thread/757
Edited by Roland Alton